The Alkaloids of Tabernanthe iboga. Part IV.1 The Structures of Ibogamine, Ibogaine, Tabernanthine and Voacangine

Abstract

The alkaloids named in thetitle are shown each to have a C-ethyl group. Dehydrogenation of ibogainewith selenium gave 4-ethyl-5, 6, 7, 12-tetrahydro-9-methoxy-2-methylindolo [3, 2-d][1] benzazepine(VIII) and 4-ethyl-8-methoxy-2, 6-dimethyl-llH-indolo [3, 2-c] quinoline (IX) …